We previously anticipated some Garrison Hearst Kingdom Hearts 3 news in November courtesy of Kingdom Hearts at the D23n event in Japan, but the Disney/Square crossover will be at Disney's American D23 Expo next month with "new information," and "special guests and surprises."
The D23 Expo takes place August 14-16 in Anaheim, California, a few months ahead of Japan's November event at Tokyo Disney, which would be cool to go to. There's a presentation on Sunday, August 16, which features, "never-before-seen gameplay, trailers, new reveals and surprises."
Star Wars Battlefront will be there and playable as well if you missed the recent alpha test. And then a bunch of Disney Infinity stuff, plus mobile games and Star Wars: Battle Pod.